CPT code 89050: Fluid cell count, without differential2026 Medicare lab fee · Clinical Laboratory Fee Schedule
A nonblood body-fluid cell count for specimens such as cerebrospinal or joint fluid; report 89050 without a differential and 89051 with one.
Medicare pays $4.72 for 89050 under the 2026 Clinical Laboratory Fee Schedule: one national amount, the same in every state and setting.
Medicare lab fee · CLFS 2026 Q4
National CLFS amount
$4.72
In effect since Jan 1, 2026. The same amount in every state, payment locality and setting.
- Geographic adjustment
- None
- Office vs facility
- Same
- Since 2020
- Unchanged
- CMS updates
- Quarterly
Medicare pays the lesser of the lab’s charge and this amount. Patients usually owe no Part B deductible or coinsurance for covered clinical lab tests.
On this page 8 sections
What 89050 covers
89050 reports laboratory enumeration of cells in a miscellaneous body-fluid specimen other than blood. Cerebrospinal fluid and joint (synovial) fluid are common examples. The count provides cellular information about these specimens. When a differential is performed, report 89051 rather than 89050 for the count with differential. A synovial-fluid crystal examination is a separate analysis, not part of the cell count.
Report 89050 for the body-fluid cell count performed; a separately performed crystal examination may also be reported. Medicare pays 89050 only through the Clinical Laboratory Fee Schedule (CLFS), not the physician fee schedule. The 2026 national CLFS amount is $4.72, unchanged since 2020. The same amount applies across states and localities, with no geographic or office-versus-facility adjustment.
This summary was written with AI assistance from CMS Clinical Laboratory Fee Schedule data. Amounts on this page come directly from CMS files.
How Medicare pays 89050
Clinical lab tests aren’t priced like physician services. They’re paid from their own fee schedule, with its own rules. See the whole lab fee schedule.
One national amount
CMS sets a single Clinical Laboratory Fee Schedule amount for 89050. There’s no geographic (GPCI) adjustment, so it pays the same in every state and payment locality.
No office or facility rate
Lab tests aren’t built from relative value units, so there’s no office and facility split: the place of service doesn’t change the CLFS amount.
Updated every quarter
CMS republishes the CLFS each quarter. New tests, often proprietary laboratory analyses (PLA codes), join during the year; existing amounts are updated each January.
Excluded from the physician fee schedule
The physician fee schedule lists 89050 with status X (excluded by statute), so the test itself is paid only from the CLFS.
89050 on the lab fee schedule since 2020
89050 · CLFS 2026 Q4 (current)
$4.72
Unchanged since Jan 1, 2020
27 quarterly CLFS releases on file, first CLFS 2020 Q1. A code missing from a quarter wasn’t on that release.
89050 compared with similar tests
- 89051Body fluid countWith cell identification$5.60
- 89050 is for a body-fluid cell count without a differential; 89051 is used when the count includes a differential.
- 89060Crystal examFluid or tissue microscopy$7.33
- 89060 examines synovial fluid for crystals. It is a separate analysis from counting cells and may be reported when both are performed.
- 89055Stool leukocytesStool white-cell estimate$4.27
- 89055 assesses leukocytes in fecal material; 89050 counts cells in miscellaneous nonblood body fluids.
89050 billing questions
When should 89050 be used instead of 89051?
Use 89050 for a body-fluid cell count without a differential. Use 89051 when the count includes a differential.
What specimens are counted with 89050?
The code applies to nonblood body fluids, including cerebrospinal and joint fluid. It is not a blood cell count.
Can 89050 be reported with synovial fluid crystal analysis?
Yes, when both the cell count and crystal examination are performed. They are separate analyses.
How does 89050 differ from 89055?
89050 is for a miscellaneous nonblood body-fluid cell count. Code 89055 assesses leukocytes in fecal material.
How does Medicare pay for 89050?
Medicare pays 89050 through the CLFS only. The national amount applies across localities, without a geographic or office-versus-facility adjustment.
Where this amount comes from
FeeBase reads lab amounts directly from the CMS Clinical Laboratory Fee Schedule file for the quarter: one row per code, with its payment indicator and national amount. Contractor-priced tests are labeled, never given a made-up amount. Amounts are Medicare payment limits, not a patient’s bill or a commercial rate.
CMS CLFS 2026 Q4 · effective Oct 1, 2026 through the day before Jan 1, 2027
Show the CMS file line behind this amount
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